Take a copy of the documents

When you copy the documents:

make a copy that can’t be changed, eg a photocopy

for passports, copy any page with the expiry date, applicant’s details (eg nationality date of birth and photograph) including endorsements, eg a work visa or Certificate of Entitlement to the right of abode in the UK

for biometric residence permits, copy both sides

for all other documents you must make a complete copy

keep copies during the worker’s employment and for 2 years after the person stops working for you